GB478693A - Improvements relating to the suppression of high frequency electrical disturbances - Google Patents

Improvements relating to the suppression of high frequency electrical disturbances

Info

Publication number
GB478693A
GB478693A GB35102/37A GB3510237A GB478693A GB 478693 A GB478693 A GB 478693A GB 35102/37 A GB35102/37 A GB 35102/37A GB 3510237 A GB3510237 A GB 3510237A GB 478693 A GB478693 A GB 478693A
Authority
GB
United Kingdom
Prior art keywords
machine
inductance
frequencies
electrical
condenser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB35102/37A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Electrical & Allied In
LESLIE HENRY DANIEL
Original Assignee
British Electrical & Allied In
LESLIE HENRY DANIEL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Electrical & Allied In, LESLIE HENRY DANIEL filed Critical British Electrical & Allied In
Publication of GB478693A publication Critical patent/GB478693A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus

Abstract

478,693. Protective arrangements. BRITISH ELECTRICAL & ALLIED INDUSTRIES RESEARCH ASSOCIATION, and DANIEL, L. H. July 18, 1936, No. 35102/37. Divided out of 478,646. [Class 38 (iv)] In arrangements for suppressing high-frequency interference caused by the influence of a dynamo-electric machine on other electrical apparatus, the terminals of the machine are bridged by a condenser 4, Fig. 1, and the frame 6 of the machine is earthed through one or more electrical filters 11, 12 which provide a low impedance earth connection at power supply frequencies and present a high impedance to one or more high frequencies or high frequency bands. A condenser 10 may be connected between one or both terminals of the machine and the frame 6, or it may be replaced by a resonant circuit suppressor having a low impedance at radio frequencies. To prevent damage to the earth lead filter during fault conditions, the ends of the inductance 29, Fig. 4, are connected to switch contacts 31, 32, the contact 31 being carried on a bi-metallic strip 33 so that the inductance 29 is short circuited before it is sufficiently heated by the fault current to become damaged. If the inductance is provided with an iron core, the contacts 31, 32 may be closed electromagnetically on the occurrence of a fault. Specification 478,646 is referred to.
GB35102/37A 1936-07-18 1936-07-18 Improvements relating to the suppression of high frequency electrical disturbances Expired GB478693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19991/36A GB478646A (en) 1936-07-18 1936-07-18 Improvements relating to the suppression of high frequency electrical disturbances

Publications (1)

Publication Number Publication Date
GB478693A true GB478693A (en) 1938-01-18

Family

ID=10138506

Family Applications (2)

Application Number Title Priority Date Filing Date
GB19991/36A Expired GB478646A (en) 1936-07-18 1936-07-18 Improvements relating to the suppression of high frequency electrical disturbances
GB35102/37A Expired GB478693A (en) 1936-07-18 1936-07-18 Improvements relating to the suppression of high frequency electrical disturbances

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB19991/36A Expired GB478646A (en) 1936-07-18 1936-07-18 Improvements relating to the suppression of high frequency electrical disturbances

Country Status (2)

Country Link
US (1) US2165886A (en)
GB (2) GB478646A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954078C (en) * 1953-07-18 1956-12-13 Siemens Ag Interference suppression of a teletypewriter or another electrical device with a commutating motor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724062A (en) * 1951-06-25 1955-11-15 Marchant Calculators Inc Electrical circuit for suppressing interference
US4145674A (en) * 1975-04-30 1979-03-20 King William M Electromagnetic interference suppression system for electrical equipment
US4329605A (en) * 1980-10-14 1982-05-11 General Motors Corporation Electric motor having radio frequency interference radiation suppression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954078C (en) * 1953-07-18 1956-12-13 Siemens Ag Interference suppression of a teletypewriter or another electrical device with a commutating motor

Also Published As

Publication number Publication date
US2165886A (en) 1939-07-11
GB478646A (en) 1938-01-18

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